How To Fix TG312 - Internal RFC exception & raised; RFC canceled

TG312 - Overview

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 312

• Message text: Internal RFC exception & raised; RFC canceled

What causes this issue?

There are various reasons why an RFC connection could not be set up by
an external program (here "R3up"):
The DDIC password is not correct (message "not authorized")
The logon language is not supported (R3up: system language)
The host name of the application server is not known to the gateway
The gateway addressed (= gateway host plus gateway service) does not
exist, is not running, or cannot be reached.

System Response

The upgrade stops with an error message.

How to fix this error?

Check the parameters entered. The working directory (this is the tmp
subdirectory for R3up) contains a trace file "dev_rfc" with information
about the error. If the trace is not detailed enough, use the following
traces as well:
In the environment of the process, set "CPIC_TRACE=2".
Also set the system trace (profile parameter rdisp/trace) to "2".
Activate the trace in the gateway (R3up: RfcTrace=ON in R3up.par)

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TG312 - Internal RFC exception & raised; RFC canceled ?

  The SAP error message TG312, which indicates an "Internal RFC exception & raised; RFC canceled," typically occurs during Remote Function Call (RFC) operations. This error can arise due to various reasons, and understanding the cause is essential for troubleshooting. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Network Issues: Problems with the network connection between the SAP systems can lead to RFC failures.
  System Configuration: Incorrect configuration of the RFC destination or the target system can cause this error.
  Authorization Issues: The user executing the RFC may not have the necessary authorizations in the target system.
  Resource Limitations: The target system may be experiencing resource constraints (e.g., memory, CPU) that prevent it from processing the RFC call.
  System Errors: Internal errors in the SAP system, such as bugs or inconsistencies in the system, can lead to this exception.
  Timeouts: If the RFC call takes too long to execute, it may time out and result